D&D has always been a little lacking in fey creatures, and it’s nice to see somewhere attempting to address that. This isn’t just a handful of creatures, either. There are over 20 monsters included here, and that's amazing for such a low price.
It’s clear a lot of love has gone into this product, and I’m already figuring out how to include some of these in my game (and devastated that it came out after I’d run my group through both a dryad encounter and a load of fungus-filled Underdark caverns). I haven’t had a chance to playtest any of them at the time of writing this, but they appear to be well thought out and the CRs look right, so you shouldn’t find yourself accidentally mudering your party if you decide to throw a Shambling Mold at them.
I really liked this, and I think it's well worth the asking price.
[5 of 5 Stars!]